I'm pretty sure a 255 wide is about the biggest for a 8" wheel. At least that's what I've seen and am gonna squeeze onto my new american racing rims. I tried to find the federal's in the sizes i need and didn't see anything for a 225/50/17 or a 255/45/17 which is what i wanna run front and rear.These are Cragar Soft 8's, 17", 8" wide.
The tires are Federal Super Steel 595's, 245-45-17. I'm thinking I may go a little bigger in the rear, but I'll have to research how big I can go on these wheels. I chose these tires because I'd have to travel about 3 hours round trip to get name brand at a good price, and these don't get all that bad of reviews. They are probably much more tire than I need!
Scott